You basically need to run the "install" script included with the program.

If you don't feel like doing that, you basically need to create a folder called "~/goopackage". Then, copy the goopackage-add and the goopackage-remove scripts into that. You can also link them to an executable by running:

sudo ln -s ~/goopackage/goopackage-add /usr/bin/goopackage-add
sudo ln -s ~/goopackage/goopackage-remove /usr/bin/goopackage-remove

Then, you can just run "goopackage-add" and "goopackage-remove".